Mesh Distance Fields on planes extend past mesh bounds

Development Asset Creation
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Hi ,

I can reproduce this in a new project. Here’s what I did to produce the scene below, which mimics the first image in the OP (albeit with the default level in the background):

214047-planedf-newproject.jpg
214047-planedf-newproject.jpg1918×1037 137 KB

  1. Create a new project via the editor launcher (I’m running v4.17.1). For expediency, I chose a blank Blueprint project with default settings (Desktop/Max quality/With Starter Content).
  2. Check Edit → Project Settings → Rendering → Lighting → Generate Mesh Distance Fields.
  3. Restart the editor.
  4. Once Mesh DFs are all generated, drag a cube mesh and a plane mesh into the level from the Modes → Place → Basic menu.
  5. Open the plane mesh in the Static Mesh editor and set LOD Sections (LOD0) → Build Settings → Distance Field Resolution Scale to 2.0 (if left at 1, this plane doesn’t generate a visible DF at all). You can also set it higher - the issue still occurs.
  6. Show → Visualize → Mesh DistanceFields.

Hope this helps. Please let me know if there’s any more information you need.